Carburetor



' June 3Q, W25.

F. BAVEREY CARBURETOR Filed Oct. 9. 1918 3 Sheets-Sheet l INVENTORWITNESSES June 33%, 125.

F. BAVEREY CARBURETOR Q Filed Oct. 29. 1918 3 sheets-sheet 2 June 3U,H925.

F. BAVERIEY CARBURETOR Filed Oct. 29. 1918 3 Sheets-Sheet 5 PatentedJune 30, 1925.

:UNITED STATES PATENT OFFICE.

FRANQOIS BAVEREY, OF LYON, FRANCE, ASSlIGNOR TO SOCIET-E DU CARBURATEURI ZENITH, OF LYON, FRANCE.

. cennunn'ron.

Application filed October 29, 1918. Serial No. 260,100.

citizen of the French Republic, residing at" Lyon, in France, haveinvented a new and useful Improvement in Carburetors, of Y which thefollowing is a full, clear, and exact description, reference being hadto the accompanying drawings, forming part of this specification, inwhichvice made inaccordance with my invention. Figure 2 is a sectionalview on the line 11-11 of Figure 1.

Figure 3 is a similar view on the line III-III of Figure 1.

Figure4 is a detail sideelevation of the valve for feeding the mainstream of gasoline. Figure 5 is a sectional view on theline VV of Figure4.

Figure 6 is a diagram illustrating the axis of the aeroplane, and thecenter of the float chamber and J Figure 7 is a horizontal sectionalview through the carburetor shown in Figure'l. This invention relates toanimprovement in carburetors, and more specifically to carburetors foraeroplane motors.

The object of'my invention is to provide an efiicient and compactcarburetor of this type having a plurality of novel controlling devicesfor the main gasoline stream which can be readily manipulated by thepilot. Another object of my invention is to so position the gasolinefeeds with relation to a vertical plane passing through the center ofthe constant level chamber and at. right angles to a vertical planeparallel to the axis of the air intake that the effective gravity headof these gasoline orifices or feeds will not be materially afi'ectedregardless of the inclination of the aeroplane, other than transversetilting when ascending or diving. A; further object of my invention isto provide a float for the constant level chamber which will properlycontrol the feed thereto, even Figure 1 is a plan view of one form ofde-.

' edge of the bowl and the cover.

llne inlet which is in communication" with asimple of construction, andcan bereadily manufactured, and which also can be readily assembled ortaken apart for inspection and repalrs.

The precise nature of my invention will be best understood by referenceto the accompanying drawing which will now be described, it beingkpremised, however, that 7 various changes may be made in the details ofconstruction and arrangement of the various parts without departing fromthe spirit and scope of my invention, as defined in the appended claims.

In the device shown in the drawings, the

reference character 2 designates a casing in which is formed the usualmixing chamber, and secured therein isa primary venturi 3. 4: designatesa casing having an air chamber therein, which is in communication withone ral with the casing 2 is a bowl 6 constituting part of a constantlevel chamber 7, having a cover 8 WhlCh 18 secured in such a manner asto form an air-tight joint between the upper 9 is a gasochamber 10 belowthe constant level chamber, 7 11 is a weighted needle valve whichcontrols the flow of gasoline from the chamber 10 to the constant levelchamber 7. This needle valve is in turn controlled by means of a float12 which isof general spherical form, and connected to the float 12 is alever 13, one end thereof being arranged to engage faces of bosses 14 onthe needle valve 11.

By making the float of general spherical form, the proper level of thefluid in the constant level chamber can more readily be maintained underthe various angular positions of the device than can be if the float isof the usual cylindrical type. 15 is an air opening, extending throughthe casing 2 and a portion of the casing 4, into the air chamberchamber.

in thelast mentioned casing, for admitting air to the constant levelchamber, so that the ressure in the constant level chamber will eapproximately equal to that in the air wardly by a spring 20 in the plug19, and

is adapted to form a bearing for a valve 21 which is rotatably mountedtherein. The

shell is provided with an opening 22 having an inclined edge 23, whilethe valve 21 is provided with a vertical slot 24 adapted to registerwith the opening 22 in the shell, as clearly shown in Figures 2, 4 and5, the arrangement being such that when the valve is shifted withrelation to the shell, the gasoline feed to the main jet will be varied,as more fully hereinafter described. Rotatably mounted within a sleeve25, which is in turn rotatably.

mounted in the opening 18, is aehollow valve 'stem 26, the lower endthereof having projections adapted to seat inreceses 27 in the upper endof the valve 21.. Connected to the upper end of this hollow valve stem26 is a readily I nel surrounding the shell 20. This .is norcrank 28.This crank 28 is connected by means of a link 29. to a crank 30 on thethrottle valve stem 17. This throttle valve stem 17 is also providedwith an operating crank"31. 7

By ference to Figures 2 and 4, it will seen that there is an annularchanmally filled with gasoline which passes through a feed 0 ning 32 incommunication therewith and with the constant level chamher, so thatgasoline will be fed from the constafit level chamber to the interior ofthe hollow valve stem 26 through the vertical slot 24, the amount offeed being controlled by the position of the-slot with relation to theinclined edge 23 of the opening 22. There is a space between theperiphery of the hollow valve stem 26 and the opening 18, which opensinto a channel 33 in communication with the secondary venturi 5, asclearly shown in Figure 1, for feeding the gasoline thereto under theaction of the engine. The hollow stem 26 is provided with a plurality ofports 34 for permittin the \gasoline to pass from the interior 0 the holow stem to the channel 33.

The sleeve 25 is provided with a port 35 which is arranged to registerwith a port 36 extending through the wall of the casing 2 into theconstant lever chamber 7, the arrangement being such that when thesleeve 25 is rotated by a crank 37 connected thereto,

the size of the opening can be regulated to vary the admission of airfrom the constant lever chamber to the upper portion of the opening 18or the main gasoline feed.

The carburetor is provided with a second gasoline feed, comprising anatmospheric well 38 which is su plied with gasoline fed through acalibrated opening 39 1n a plug 40 having a screw-threaded engagementwith the wall of the well. The plug 40 is pro- I vided with an annularrecess 41 which is in communication with the opening 39 by means oftransverse passa es extendin through the plug. Gasoline is ed to thecalibrated openmg 39 from the float'chamber 7 through an opening 42 (seeFi re 1). 43 is an air opening communicating with the'air space of theconstant level chamber and the top of the well 38. Mounted in the top ofthe well 38 is a sleeve 44, the upper portion thereof fitting closewithin the wall of the well, while the lower portioii thereof is reducedin diameter and extends to a point slightly above the plug 40. 45 is anopening communicating with the well 38 and the channel '33 to feed thegasoline from the well to the secondary venturi, the gasoline from bothfeeds being. delivered to the channel 33.

' The carburetor is also provided with a slow-speed jet, which comprisesa tube 46 extending into the well 38 within the sleeve 44. This tube 46is connected to' a valve 47 on the upper end thereof, having ascrewthreaded portion 48 and an adjusting head 49. 50 is an openingextending through the valve to the interior of the tube 46, throughwhich gasoline is fed for the slow-feed jet to a chamber within theupper portion of the sleeve 44. The valve 47 1s located above a valveseat formed in the sleeve 44 and by raising and lowering this valve, theamount of air passing .to the chamber in the upper portion ofthe sleeve44 from the upper portion of the well to the slow-speed et 51 canreadily be adjusted. \This slow-speed jet 51 communicates with themixing chamber at a'point adjacentto the edge of the throttle valve whenthe throttle valve is in its closed position, as shown in Fi re 1. a

By reference to Figure 1 it will be clearly apparent that the gasolinefeeds, namely the auxiliary atmos heric well and the main atmosphericwel havin its feed controlled by the valve 21, are ad acent to and onopposite sides ofa vertical plane indicated by the line AA ssing throughthe center of the float cham r andat right angles to a vertical planearallel to the intake passage 2 of the ca ureter. The carburetor ismounted onits support in such manner that Y i ndicated in Figure Thisarrangement,

in combination with the means for mainwells to compensate for thedecreased level in the other of the atmospheric wells.

The advantages of the present invention arise from the provision in asingle carburetor of means for maintaing a constant supply of fuel inthe constant level chamber irrespective of the inclination thereof, to;gether with an arrangement of fuel feeds supplied from the constantlevel chamber for maintaining a constant fuel supply at all times.

Further advantages arise from the .provision of means for varying thegasoline feed from the main jet in accordance with the variations in theposition of the throttle.

I claim: i

1. A carburetor for feeding uniformly under various degrees ofinclination, comprising a constant level chamber, means for malntaininga constant level of fuel therein irrespective of the inclination of thecarburetor, a mixin chamber having its longitudinal axis lying in aplane parallel to the longitudinal axis of the vehicle carryingthecarburetor, a plurality of atmospheric wells fed from the constant levelchamber and communicating with a single common fuel inlet passage, saidwells being on opposite sides of adjacent a vertical plane perpendicularto the longitudinal axis of the mixing chamber and extendingsubstantially through the middle of the constant levelchamber,substantially as described.

2. A. carburetor for feeding uniformly under various degrees ofinclination of the vehicle carrying the same, comprising a constantlevel chamber, means for maintaining a constant level of fuelthereinirrespective of the inclination of. said vehicle, a plurality ofatmospheric wells fed from the constant level chamber and communicatingwith a single common fuel inlet passage, said wells being substantiallyequal distances in front of and behind a vertical plane passing throughthe center of the float chamber, substantially as described. p v

3. A carburetor for feeding uniformly 'under various degrees ofinclination of the vehicle carrying the same, comprising a mixingchamber, the longitudinal axis of the mixing chamber lying 1n a plane.parallel with the longitudinal axis of the supporting vehicle, aconstant level chamber at one side of the mixing chamber, a nozzle forfeeding fuel to the mixing chamber, a plurality of atmospheric wells forfeeding fuel to said nozzle, said Wells communicating with a 7 singlecommon fuel inlet passage being on opposite sides of a vertical planeperpendicular to the longitudinal axis of the mixing chamber andextendingthrough the middle of the float chamber, substantially asdescribed. I

4. A carburetor comprising a mixing chamber, a constant level chamber atone side of the mixing chamber, a nozzle for feeding fuel to the mixingchamber, a'plurality of fuel feeds for feeding fuel to said nozzle, saidfuel feeds being subjected to atmospheric pressure and located adjacentto and on opposite sides of a vertical plane passing through the centerof the constant level chamber perpendicularly to the longitudinal axisof the mixing chamber, and spaced longitudinally from each other in thedirection of the length of the vehicle on which the carburetor ismounted, the longitudinal axis of said mixing chamber lying in a planeparallel to the longitudinal axis of the vehicle "carrying thecarburetor, substantially as described.

5. A carburetor comprising a constant level chamber and a mixing,chamber, a

constant level chamber and communicating with a single common fuel inletpassage, means for varying the feed to one of: said wells in accordancewith the position of the throttle valve, a calibrated feedfor the otherof said wells, said wells having communication adjacent their upper endswith the air space in the constant level chamber, and a fuel nozzlecommunicating with said inlet passage and with the mixing chamber, 1

substantially as described.

6. A carburetor comprising a constant level chamber, two fuel wellsconnected with said chamber to receive their fuel supply therefrom, saidwells being located at opposite sides of a vertical plane passincentrally through said chamber, means or maintaining a constantlevelinsaid chamber ir respective of the angle of inclination of thecarburetor, and a mixing chamber into which both wells are arranged todischarge, the said wells communicating with a single common fuel inletpassage and being spaced longitudinally from each other in the directionof the length of the vehicle on which they are mounted, substantially asdescribed.

7. Ina carburetor, a constant level chamsaid chamber and receiving theirfuel supply therefrom, said wells being located at equal ber, twoatmospheric wells connected with 4 I g 1,543,97Q

distances from and on opposite sides of a being. spaced longitudinallyin the direction 1 vertical plane passing centrally through of thelength of the vehicle on which they said chamber, means for maintaininga conare mounted, substantially as described.

stant level in said chamber irrespective of In testimony whereof, I havehereunto the angleof inclination of the carburetor, set my hand.

and a mixing chamber into which both wells FRANQOIS BAVEREY.

are arranged to discharge, there being a Witnesses: common channelconnecting both of said' L. ERHER,

wells and said mixing chamber, said wells MARINYVACHOR. i

